Forced-draft water-grate.



HARRY F. MORRIS ANI) RI'I'NER SHINN', 0F COLL1N'GSWOOD,'N'EW JERSEY.

FORCED-DRAFT WATER-GRATE.

Sp eocation of Letters Patent.

Patented Apr. 2, i916.

Application led September 14, 1917. Serial No. 191,361.

To all whom t may concern.' Y

Be it known that we, HARRY F. MORRIS and RITNER SHINN, citizens of the United States, residing at Collingswood, in the, county of Camden'and State of New Jersey, have invented certain new and useful Im-4 provements in Forced-Draft Water-Grates, of which the following is a specification.

Our inventionrelates to improvements in water grates used in connection with forced draft.

An object of our invention is to provide means, in a grate of the class descrlbed, to admit the proper amount of air to said grate to obtain a more perfect combustion of fuel under a given pressure.

A further object is to provide an interchangeable disk, in connection with said grate, whereby the volume of air -p-to be admitted to the rate'may be regulated, as desired, in accordance with the pressure, without removing or changing the grate.

A further object is to provide means, connected with said grate, to prevent a back draft of gases thereby avoiding the danger of an explosion. Y

A further object is to provide means to prevent sediment settling in the air chamher and the elimination of an ash pan.

We attain these and other objects by means of the mechanism illustrated in the accompanying drawings, wherein,

Figure 1 is a plan view of the device;

Fig. 2 is a sectional view of the device on line 1-1 of Fig. l; v Y

Fig. l3 is a plan view of the disk used to regulate and vary the amount of air to be admitted to the grate, three separate disks being shown, illustrating variations in the size and number of openings therein;

Fig. ,4 is a sectional view of a disk illustrating the locking mechanism, and

Fig. 5 is a sectional view of the ball plate showing the opening therein with the ball seated. i

Similar reference characters refer to similar parts throughout the drawings.

Referrin to the drawings a fire grate a is provided; at the front with la water inlet pipe 77, whereby water s enters and circulates through said grate a. A water outlet pipe i is provided at the back of said errate a whereby the water after circulating through said grate, and beino' subjected to the heat therein, is vcarried o thus providing a continuous circulation of water through said The said grate a is provided with cored l holes 0, having the recesses p to engage the ears or lugs f on disks c, so that said dlsks c ma be securel held inpositi'on.

n air ,chamber b is provided, having the door 7e for access thereto and a latch Z to secure same in a closed position. This door 7o, however, may be secured by means of a bolt, or other suitable means as will insure, as near as possible, an air tight connection.

To obtain forced draft air is forced, by a blower, or any suitable means, through the pipe y' into and through the airchamber b as indicated by the arrows. Said air chamber b has cast integral therewith the li m upon which rests the ball plate r. This liall plate r is made ofsteel, or other suitable heat resisting material, and is provided with the openings e, the -upper part of said openings e being ground out to `form a socket for the ball to seat. These openings e correspond with the cored holes o in thef grate and communicate with the air chamber Z). The ball 0l is constructed of steel, or other suitable heat resisting material, and of a size and weight suitable for the purpose hereinafter set forth.

The disks c are provided with an opening or openings g, as illustrated, and have integral therewith, the ears or lugs f to engage in recesses p in the grate a.

`In operative position the grate a rests upon the ball plate r which in turn rests upon the lip m ofthe air chamber b. The balls d rest in the sockets ground in the upper part of the openings-e of said ball plate r. The disks c are then placed over the cored holes o` in the grate a and are turned until thelugs thereon engage with the re# cesses p, as before stated, securely' holding the disks in positien. Air is then forced into the air chamber b, in the manner hereinbefore set forth. his will force the ball d slightly from itsi eat in the socket aforesaid and to one side t ereof, thereby permitting the air to enter and circulate throughV the cored holes 0 of the grate a.

The amount of air to be admitted to the grate will determine the area of the openings-in the disks to be placed in operative position. The greater the pressure the less requisite, in connection with the pressure of the forced draft, to obtain the proper combustion of fuel.

5. In. combination With a water grate, having a continuous circulation of Water therethrough and having openings therein, of an air chamber, means for admitting air to said chamber, a plate secured between said air chamber and said grate having openings therein to correspond with the openings in said grate and communicating with said air chamber, whereby air is admitted to said grate, a ball, the openings in said plate being ground in the upper portion thereof to form a socket in. which the ball normally seats, thus providinig means for the prevention of the back dra t of gases when the draft is ofi' and the ball seated, substantially as shown and described.-

In testimony whereof we afIiX our signatures in the presence of two witnesses. HARRY F. MORRIS.

RITNER SHINN. Witnesses:

` MAHLON VAN BoosKmK,

JOHN F. MAoINDoE.

Copies of this patentA may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

